It's really not. He's just one of those kids that will carry a bit extra, .. "Puppy fat" (as I've always known it), for a touch longer than others, .. but when it finally gets transformed into height, & muscle mass, .. he's going to be a beast.... I mean like an old time 6' 4" blacksmith type.
Just as a point of reference, .. does anyone remember how Jobe Wan began his playing career??
He was a very similar character, physique wise. Carried that little extra for 2 to 3 years in the mid section, .. thighs like lamp posts ... . And the thing is, you don't actually want to strip them of it too early, .. it's still there for a reason, it needs to be there for him for when the body calls on it, to put into that last late growing that occurs with their type.
The difference is, what Jobe could get away with in the game as it was back even then, .. you simply can't in today's run run run & then just fkn run some more style of AFL.
I've seen many of his, & Jobes type over the years, both locally, & in the AFL.
He'll be fine.